Further study details as provided by China Academy of Chinese Medical Sciences:

Primary Outcome Measures:

The proportion of patients in each treatment group who had clinically significant change as defined by the angina-frequency score on the Seattle Angina Questionnaire at day 30 [ Time Frame: Day 30 ] [ Designated as safety issue: No ]

Seattle Angina Questionnaire, a 19-item questionnaire that quantifies physical limitations due to angina, any recent change in the severity of angina, the frequency of angina, satisfaction with treatment, and quality of life. Scores range from 0 to 100; higher scores indicate better health status.With a score of 20 or more on the angina-frequency scale indicating that the patient was clinically significant change.

Secondary Outcome Measures:

Total score of symptoms questionnaire of TCM [ Time Frame: Day 0, Day 7, Day 14, Day 30, Day 60, Day 90 ] [ Designated as safety issue: No ]

The symptoms questionnaire of TCM consists of 6 symptoms that described in traditional Chinese medicine, including chest pain, chest distress, palpitation, dark-purple lip, dark-purple tongue and unsmooth pulse. Each symptom was assessed by the Visual Analogue Scale（VAS），where a higher score meant higher severity.

The proportion of patients in each treatment group who had clinically significant changes in the other four Seattle Angina Questionnaire scales （The physical limitation, angina stability, treatment satisfaction, and quality of life） [ Time Frame: Day 0, Day 7, Day 14, Day 30, Day 60, Day 90 ] [ Designated as safety issue: No ]

We defined clinical significant changes as a difference of 8 points or more on the physical-limitation scale, 25 or more on the angina-stability scale, 12 or more on the treatment-satisfaction scale, or 16 or more on the quality-of-life scale.

The frequency of anginal attack every week [ Time Frame: Day-7 (if exist), Day 0, Day 7, Day 14, Day 30, Day 60, Day 90 ] [ Designated as safety issue: No ]

The frequency of anginal attack was recorded by the patients with the use of the diary cards which will be collected from the run-in period (Day -7) to the end of follow-up (Day 90).

Canadian Cardiovascular Society (CCS) grading of angina pectoris [ Time Frame: Day 0, Day 7, Day 14, Day 30, Day 60, Day 90 ] [ Designated as safety issue: No ]

Consumption of Short-acting Nitrates [ Time Frame: Day -7( if exist), Day 0, Day 7, Day 14, Day 30, Day 60, Day 90 ] [ Designated as safety issue: No ]

Change in the electrocardiogram (EKG) [ Time Frame: Day 0, Day 7, Day 14, Day 30, Day 60, Day 90 ] [ Designated as safety issue: No ]

Changes in the Serum Lipid, the high-sensitivity C-Reactive Protein(hs-CRP) and the Platelet Aggregation Rate [ Time Frame: Day 0, Day 14 ] [ Designated as safety issue: No ]

Incidence of new-onset major vascular events in 90 days [ Time Frame: Day 90 ] [ Designated as safety issue: Yes ]

Incidence of severe hemorrhages in 90 days [ Time Frame: Day 90 ] [ Designated as safety issue: Yes ]

The definition of "Severe hemorrhages" is in accordance with the GUSTO bleeding criteria, including fatal intracranial hemorrhage (ICH), symptomatic intracerebral hemorrhage (sICH) or which could result in substantial hemodynamic compromise requiring treatment.

Incidence of moderate hemorrhages in 90 days [ Time Frame: Day 90 ] [ Designated as safety issue: Yes ]

The definition of "moderate hemorrhages" is in accordance with the GUSTO bleeding criteria, which requires blood transfusion but not results in hemodynamic compromise.

Based on the standard medical care, 40ml of Danhong injection, added into 250ml of 0.9% saline, given by continuous IV infusion at 2.5ml/min within 2 hours.

Drug: Danhong injection

A kind of injection made from two kind of Chinese herbs: salvia miltiorrhiza and safflower

Other: Standard medical care

Standard medical care is in accordance with China Guideline for the diagnosis and treatment of Chronic Stable Angina (2007).

Placebo Comparator: Placebo

Based on the standard medical care, placebo was 40ml of 0.9% saline, added into 250ml of 0.9% saline, given by continuous IV infusion at 2.5ml/min within 2 hours.

Other: Standard medical care

Standard medical care is in accordance with China Guideline for the diagnosis and treatment of Chronic Stable Angina (2007).

Drug: Placebo

0.9% saline added into 250ml 0.9% saline by an independent research nurse, sealed with brown bag in order to make the investigators and patients blinded, using brown infusion tube for infusion.

Eligibility

Ages Eligible for Study:

18 Years to 70 Years

Genders Eligible for Study:

Both

Accepts Healthy Volunteers:

No

Criteria

Inclusion Criteria:

Female or male inpatients.

Age: 18 - 70 years.

Patients with clinical diagnosis of chronic stable angina and must meet one of the following conditions:1）Patients who have a history of myocardial infarction and ST-T changes;2）Stenosis of more than 50% in at least one major epicardial coronary artery shown by Coronary Angiograph or CT Angiography; 3）Patients with coronary heart disease were determined by radionuclide angiocardiography.

Patients with moderate angina pectoris (The definition of "moderate angina pectoris " is in accordance with the Canadian Cardiovascular Society (CCS) grading of angina pectoris,which be classified to II or III.

Patient is willing to participate voluntarily and to sign a written patient informed consent.

Exclusion Criteria:

Woman with pregnancy, lactation or positive result of pregnancy test, or woman who is under menstrual period.

Woman who disagree with contraception during treatment period

Patients with severe complications that would make the condition more complicated assessed by the investigator, including liver or renal dysfunction, severe cardiopulmonary dysfunction, pulmonary hypertension, chronic obstructive pulmonary disease, a history of epilepsy or cerebral hemorrhage .

Patients who were angina-free during the run-in period without taking any drug.

Patients with myocardial infarction or Canadian Cardiovascular Society (CCS) grading of angina pectoris class IV within the preceding 3 months

Patients with history of drug-induced bleeding or history of bleeding caused by warfarin.

Patients with history of hematopoietic system diseases.

Patients who had surgery within the past 4 weeks and have hemorrhagic tendency.

Patients who is participating in other trials or has been participated in other trials in recent 3 months.

Patients with history of allergy or suspected allergic to the drug.

Patients who were suspected addicted into alcohol or drug abuse in the past 2 years.

Patients with mental disorder.

Patients who were unable to participate in the study as judged by investigator.

Patients who were family members or relatives of the research center staffs.

Contacts and Locations

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Please refer to this study by its ClinicalTrials.gov identifier: NCT01681316